SIP line with routing tag 10:
- A SIP line is given the routing tag 10. There is an IP network named INTRANET with the
interface tag 0 and a default route named INTERNET with the routing tag 0.
- In this case the SIP line cannot register because the routing tag 10 does not exist in any of the tables.
- A SIP line is given the routing tag 10. There is an IP network named INTRANET with the
interface tag 10 and a default route named INTERNET with the routing tag 0.
- In this case the SIP line can register because the routing tag 10 exists in the IP network INTRANET.
- A SIP line is given the routing tag 10. There is an IP network named INTRANET with the
interface tag 0 and a default route named INTERNET with the routing tag 10.
- In this case the SIP line can register because that routing tag 10 exists in the DEFAULT route INTERNET.
Special case: WAN tag table
If a port is to be forwarded or a VPN dial-in operates on an Internet connection that uses a routing tag other than 0 and the forwarding destination has tag 0, then the WAN tag table needs to have an entry for the Internet connection with the same routing tag (in this example tag 1) so that the response packets can be routed over this Internet connection. Instead the response packets will be sent via the Internet connection with routing tag 0. Furthermore, a firewall rule with the routing tag 65535 has to be created, which then removes the tag set by the WAN tag table. Otherwise, packets intended for the local network will be sent out over a suitable route (such as the Internet connection).
